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Constant current supplies into MPPT

Please note this is a copy of my original postings http://groups.google.ca/groups/sear...group=&as_usubject=&as_uauthors=m+II&safe=off "I think MII should be careful, we can all complain...

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PV or Wind with MPPT for battery charging

http://groups.google.ca/groups/sear...group=&as_usubject=&as_uauthors=m+II&safe=off "I think MII should be careful, we can all complain about people if we put our minds to it." Steve ----...

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need advice please

I've been looking over grid-tied photovoltiac-enphase systems in the 4 to 5 kw range. I'm really taken with the enphase inverters. They look perfect except for the possibility of the grid going down...

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sug's for very low maint. low usage charger/batter system?

Thanks to folk here a couple of years ago, I learned about a bunch of mainstream, off-the-shelf, door openers that are using 12VDC battery "backup", with the motors themselves running at 12vdc. The...

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PV, charge controller and an amp hungry kettle?

Quick question relating to new "making camping comfier" project. Here's the problem... I have my PV solar panel hooked up to a car battery via a charge controller rated to a maximum 8A output & I'm...

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Utilitech Model #:LA19DM/LED lamp and FM radio Static

I bought a number of these lamps to use at my weekend cabin. I liked these because they produce 450 lumens while consuming only 7 watts. My Solar Panel only produces 42 watts, so keeping consumption...

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good for us, bad for the mfg's

Module prices.... <http://www.bloomberg.com/news/2011-06-19/short-sellers-hammer-solarcoaster-as-glut-of-chinese-panels-sinks-prices.html>...

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thinking big

Imagine for a moment you had a billion dollars to spend on a utility-sized PV installation. How much power would it generate? How much space would it take?

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display panel

Hi just required new solar panels fitted and they never fitted the display unit, which tell me if its working. Does the panel tells me that unit is working and when its not. I haven't got the unit, so...

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Solar Credits

There are federal solar energy tax credits. Having read the wind energy credits were just cut; does anyone know their fate? -- A host is a host from coast to coast.................wb8foz@nrk.com &...

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display unit

Hi I got solar panels fitted. I got them fitted with a government scheme. I got them fitted and I never got a display unit fitted, I don't know if the panels are working, I presume they are. I phoned...

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solar car by a student of 19

http://photos.caixin.com/2012-04-09/100377571_1.html -- Regards, Lu Wei PGP key ID: 0x92CCE1EA

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RETScreen Policy Toolkit for Clean Energy

Dear Colleagues ... Kindly see an announcement below concerning the new RETScreen Policy Tool Kit. This is good for policy analysts, bankers and investors. Regards Roland R. Clarke PhD RETScreen...

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Inverter with double input: 220 volt and pv panels

Is there an inverter that has double input and one output 220 volt? The dual input is one for the photovoltaic panels (1 kWp) and one for the grid 200 volt. I am grid connected but have not a...

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solar panel websites in the US & Canada

Can anyone recommend any solar panel websites in the US & Canada that have a wide selection of panels as well as other solar products that is worth checking out? The more recommendations the...

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silicone to prevent solar cell oxidation?

Hi! In this video http://www.youtube.com/watch?v=EEOBYulZ_fI&t=3m48s the guy says Sylgard 184, a brand of silicone, protects the cells from moisture, the environment and oxygen. "You won't get 30...

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solar cell defects?

Hi asp, sec! I bought 300 "Class/Grade A" solar cells [1]. Just when I wanted to resell some of them I discovered that most of them (all that I checked) have a few (about 2-6) complete or partial gaps...

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data logger for a solar site

Hi Everybody, I am looking for a data logger which collects data from my "Solar remote site". I can visit these sites every 4 to 6 months for maintenance and need to collect data on a memory card or on...

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A useful PV simulation tool

I just come across this software, and find it should be a good tool for PV system designers . It's rich in data and easy to use. It's not free (I understand that data collection and updating needs a...

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Unisolar panels.....comments.....???

I have been thinking of purchasing some unisolar panels..... they seem to be among the least expensive per watt....and appear easiest to install....(glue to roof) Would like to know if anyone has had...

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suggestions for garage door?

I've got a neighbor, kind of.., who has a car garage with an overhead door. No electric lines to it, so the door has to be lifted manually. Even with decent springs and counterweighting it's a big...

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Re: blocking diode help

solar9833@hotmail.com (solarguy) wrote: >Since there [aren't] any blocking diodes in line with the input, my >trimetric 2020 indicates a drain of .6 amps at night (with everything >else...

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Don't worry about the setback for Santas Rails anymore.

It looks like the Santas Sleigh shouldn't bother your panels this year. I did some research and I think they removed the rails. http://www.ge.com/santa/ Merry Christmas Randy

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Re: Want to run standby generator and still get solar output

In article <0e8cfefa-2453-4130-bed3-7a3db5435d3f@34g2000yqp.googlegroups.com>, ghio <bealiba@gmail.com> wrote: > On Jan 11, 10:58 am, spaco <sp...@baldwin-telecom.net> wrote: >...

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Re: Well Pump question

On Wed, 6 Jan 2010 03:16:54 +0000 (UTC), "Robert Olin" <jolin@whidbey.net> wrote: >I was asked to replace a well pump for a client who has an off grid aviarey. >The well was drilled about...

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(OT) Understanding million, billion, trillion.....

Most people know how long a second is.... 1 million seconds = aprox. 11 days 1 billion seconds = aprox. 33 years 1 trillion seconds = aprox. 33,000 years The human race has been around for aprox. 6...

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Where to buy broken or chipped solar cells

Without getting ripped off, are there people who know of reputable sellers at good prices? I want to experiment with solar and thought i start with rejects. Bart

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UK Solar PV flyer - snake oil or just sloppy?

A leaflet delivered recently included the following: "The Department of Energy and Climate Change will apply the following tarriff for feed in: 41.3p for every unit generated by your solar PV equipment...

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high voltage MPPT

Does anyone make a MPPT that accepts ~250V and outputs 48V? -- A host is a host from coast to coast.................wb8foz@nrk.com & no one will talk to a host that's close........[v].(301)...

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energy per day from a 5KW system?

I am thinking seriously about installing a 5KW photovoltaic system. It will be grid connected. The area I live in averages 7.5 hours of sunshine per day (taken over a 100 year period.) How much outpout...

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Exceltech inverters?

Hello all. Does anyone have experience with Exceltech Sinewave inverters? I have been talking with other people about my system but when I tell them about the cost of the Outback (a great inverter,...

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Fly Eyes Used For Solar Cells

http://news.discovery.com/tech/fly-eyes-used-for-solar-cells.html t takes a twisted engineering mind to come up with something this brilliant: a biomimetic mold constructed from fly eyes. One...

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calculating loses

So I have a demand of 1.6 KWh/day, and insolation is 5.5 kwh/M^2day. If the world was perfect, I'd just divide to get panel area. It's not, so I assume there are other factors I must include; the panel...

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Re: Grumman Solar Hot Water Heater

In article <3f46a363-b08f-46c9-9b9f-5675bcc48eff@q2 3g2000yqd.googlegroups.com>, phillb <pblowers@hotmail.com> wrote: > The Grumman Sunstream CF100 Solar Hot Water heater I have is old,...

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Calculating how much electricity I can produce

Hi, I'm in Brisbane Australia. Currently we some decent government grants such that a 1.5kw solar system costs around $3000AUD. I've just been observing my roof recently. It is facing west north west...

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Re: Renewable Energy projects with the Arduino Microcontroller

"sspence" wrote in message > We have been designing power monitors solar trackers and differential > controllers with the arduino microcontroller. Inexpensive, powerful, > and easy to use....

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Bypass Diodes

Is there any advantage to using Germanium or Schottky diodes rather than Silicon for bypass diodes ? In a gridtie system what reverse Voltage rating do the bypass diodes need to be ? Thanks.

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energy and the particular case of solar

hi look at this link sourceforge.net/projects/usbms/. however it might be appropriate to take into account the security of the solar simultaneously after analyzing energy

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Censorship of solar companies?

Anybody here experience people dogging on or getting redirected from Sunelec.com? I am a fan of theirs but also deal with many of the other guys and find everyone so far to be a class act. Each Store...

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energy and solar

hi before evaluating energy as well as solar fine tuning, it might be appropriate to increase the monitoring of the solar accurately. it is also worth detailing that java sample public menu filemenu;...

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Photocell For Bird Bath Pump From Newbie On Photovoltaics

Hello, Would be most grateful for some advice with this. Have the typical round, pedestal base, type of bird bath on my Deck. Didn't attract too many birds, and have been told that the reason is that...

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Aquajet Solar Cell Sealing ?

Hello, I wrote www.siliconsolar.com/solar-birdbath-fountains regarding this, but they never answered. A bit disappointing. BTW: Do they mfg. the cells themselves, or a China import ? I will probably...

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inverter for solar cell

Hello everyone, I'm having problems in using PSpice to simulate an ideal switches inverter which uses 4 transistor(I use MOSFET). Can somebody explain how the configuration of the schematic circuit in...

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using solar panels to charge a UPS?

A 4 kVA UPS was left behind by a tennant who moved out of an office we rented. It still works, but the batteries are 3 years old, perhaps one foot in the grave. Now I wonder if I can use this to make a...

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V/I for panels

How much does the cell size vary over model/technology? I ask because I am seeking panels with more cells in series, to get higher voltages. -- A host is a host from coast to...

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PV powered circ pumps

Grundfos makes a line of well pumps, SqFlex, that are designed to run from PV panels; they arer designed to accept a range of voltages. I'm seeking a circulator pump line of the same ilk. The task is...

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Newbie looking for some info

I have been looking at the solar cells and panels for years, but that was as far as I went with it so far. But I am considering to install a small system for my hobby room. How can I estimate how large...

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New silicon technology

http://groups.google.ca/groups/sear...group=&as_usubject=&as_uauthors=m+II&safe=off My 'GymyBobism' collection...updated daily: ========================================= ## some '#'...

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Re: Price of Solar

On Sat, 25 Oct 2008 22:53:13 -0400, Ron Rosenfeld <ronrosenfeld@nospam.org> wrote: >On Sat, 25 Oct 2008 13:36:33 -0700, "Sac Dave" <diacono@sbcglobal.net> >wrote: > >>My Wife...

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Would you like solar cells with various colours?

You may know that solar cells are generally blue and become black when sealed in modules or panels. Would you like them in brown, gold, olive, or purple? We are doing experiments on this recently and...

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